Type retaining device for printing machines



Feb. 6, 1934.

TYPE RETAINING DEVICE FOR PRINTING MACHINES Filed Sept. 7, 1932 //d as L \'a L 30 H E 6 j '3 q /2 z Ji s- I A WITNESSES.- INVENTORS:

f A TTORNEYS.

Patented Feb. 6, 1934 1 UNITED STATES PATENT ries TYPE RETAINING DEVICE FOR PRINTING MACHINES Erwin H. Aldinger and Walter E. Fricdrichs, Philadelphia, Pa.

Application September 7, 1932. Serial No. 631,962

5 Claims.

the provision of simple type retaining meanswhich are designed to engage the surface grooves in the rollers or plates of the printing machines, and which, although capable of securely holding in place different kinds of type including electrotype plates, rule type and individual type pieces, can be applied and removed with the utmost ease and rapidity incident to setting up the type.

Another object of our invention is to attain the foregoing advantages in type retaining devices that lend themselves to very economic and expeditious manufacture in quantity from spring strip metal.

Further objects and attendant advantages of this invention will be manifest from the detailed description following of the attached'drawing,

wherein Fig. I is a fragmentary perspective view of the cylinder of a multigraph printing machine showing the manner in which diiferent forms of our novel type retaining devices are used.

Fig. II is a perspective view on a larger scale of the form of retaining device provided for se curing electrotype plates.

Fig. III is a fragmentary perspective View on a still larger scale supplementary to Fig. I show ing how the device of Fig. II engages diagonally over the corner of the electrotype plate to hold the latter to the type drum.

Fig. IV is a perspective view of another form of retaining device adapted for detachably securing rule type to the drum of the printing machine.

Fig. V is a detail perspective view supplementary to Fig. I showing more clearly how the retaining device of Fig. IV serves to secure the rule type to the drum of the multigraph machine.

Fig.VI shows a form of retaining device provided for use at the ends of lines of individual type pieces.

Fig. VII is a detail perspective view which is supplementary to Fig. I and further shows how retaining devices of the form illustrated in Fig. VI are intended to be used.

Fig. VIII is a perspective view of another retaining device in the form of a column band embodying our invention, the same being serviceable as a stop for the ends of consecutive lines of individual type pieces; and

Fig. IX is a fragmentary detail perspective view supplementary to Fig. I showing to better advontagehow the column band of Fig. VIII is applied to the type drum.

For convenience in illustrating our invention, We have depicted at 10 in Fig. I, a portion of the type drum of a multigraph machine having a circumferential series of longitudinally extending 1T-shaped type receiving grooves 11 in its surface. It will be obvious, however, from the disclosure hereinafter that our improved retaining means can be used as readily within the similarly grooved flat plates of other kinds of printing machines or presses.

I For the purpose of detachably securing an elec trotype plate such as delineated at 12 in Figs. I

and III to the surface of the drum 10, we have provided retaining devices of the sort generally designated 13 in the above figures aswell as in Fig. II. .Each retaining device 13 is fashioned from suitable spring strip metal (preferably steel), and formed at one end with a full width depending L-shaped projection 14 adapted to engage ina groove 11a of the drum 10 with its horizontal portion 14a bearing upward toward 30 the head 15 of the partition or wall between the groove 11a and the neighboring groove 112;. At the opposite end, the retaining device 13 is formed with a depending open top loop tongue 16 which is adapted to frictionally engage within another groove 110 further around the type drum 10. This loop tongue 16, it will be noted, is narrower than the fiat intermediate or connecting portion 17 of the retaining device 13, so that said connecting portion may be made to diagonally overlapa corner of the electrotype plate 12 as illustrated in Figs. I and III. The retaining device 13 is further formed beyond the spring loop 16 with a short horizontal projection 18 beneath which the nail of the thumb may be inserted to remove said device from the drum 10. Two of the retaining devices 13 are ordinarily ample for a small electrotype plate 12 when they are used at diagonally opposite corners as shown in Fig. I; while larger electrotype plates may.100 require a retaining device 13 at each corner.

At 20, Figs. I and V, we have indicated a vertical rule type, which, as ordinarily, is of T-cross section with formation of a base portion from which the printing edge projects centrally. For i detachably securing such a rule type 20 to the surface of the type drum 10 of the printing machine, we have devised clip-like retaining devices 21 having the form shown in perspective in Fig. IV. As depicted, each device 21 is characterized by a pendant open-top spring loop tongue 22 similar to the spring loop 16 of the retaining device 13 hereinbefore described, and the lateral projections 23 to opposite sides of the top of said spring loop adapted to lap the surface of the drum at opposite sides of the slot 11b into which the device is inserted as shown in Fig. V and to thereby limit the penetration of the tongue into the slot. Referring again to Fig.

IV, it will be noted that the retaining member is centrally notched through the opposite sides of its loop tongue 22 and lateral extensions 23 as at 24 for capacity to embrace the basal portion of the rule type 20 as shown in Figs. I and V.

In Fig. VI we have delineated still another form of retaining device 25 for use at the ends of lines of individual type pieces such as shown at 26 in Fig. I. The retaining device 25 is exactly like the retaining device 21 of Fig. IV except for the omission of the notches 24 which characterize the latter. In use of the retaining device 25, the spring loop 27 thereof is pressed as far as permitted by the lateral projections 28 into the groove lid in which the type pieces 26 are placed with said device abutting the end type of the series.

Like all the other type retaining devices described up to this point, the column band device 30 of Fig. VIII is made from spring strip metal and it will be noted has a configuration resembling that of the retaining device 13 for securing the electrotype plate to the drum 10 in that at one end it is provided with a downward L-shaped projection 31 and at the opposite end a downward open top loop projection 32. The loop projection 32 of the retaining device 30 is, however, of the same width as the inter-.

mediate connecting portion 33. The retaining device 30 is placed on the drum 10 in exactly the same manner as described of the retaining device 13, and, as shown in Fig. I, serves as an end limit or stop for consecutive lines of individual type pieces.

From the foregoing it will be seen that the seV-. eral different forms of our type retaining devices all have in common, 9. depending open top springloop tongue to engage a groove in the type drum, as well as projections to limit the extent of penetration of the tongue into the groove. case, it will be further noted that the rounded end of the spring tongue corresponds substantially in width to the narrow portion of the type receiving groove; while, in the expanded position, the sides of the tongue diverge relative to the rounded end. In practice this divergence is made such that suflicient frictional pressure is exerted by the tongue against the sides of the groove in the drum to insure against dislodgment of the retaining device during operation'of the printing machine. On the other hand, by virtue of the construction of the spring loo-p, its upper open end is compressible so that each retaining device can be removed with comparative ease and rapidity incident to setting up the type.

In each Having thus described our invention, we claim:

1. As a new article of manufacture, a retaining device for detachably securing an electro-type plate to the T-grooved surface of the type drum! or plate of a printing machine, formed from spring strip metal with a pendant L-shaped projection at one end to engage in a groove of the type drum or plate, an open top pendant loop tongue at the opposite end to engage in another groove in the type drum or plate, and a connecting portion above the surface of the drum or plate to engage a corner of the electro-type plate.

2. As a new article of manufacture, a retaining device for detachably securing an electro-type plate to the T-grooved surface of the type drum or plate of a printing machine, formed from spring strip metal with a full width pendant L- shaped projection at one end to engage a groove in the type drum or plate, a narrower pendant open top loop to frictionally engage another groove of the type drum or plate, and a connecting portion to diagonally overlap a corner of the electro-type plate aforesaid.

3. As a new article of manufacture, a device for retaining type in the T-groo-ved surfaces of the type drums or plates of printing machines, having the form of a band fashioned from spring strip metal, with a depending hook-like projection at one end to engage a groove in the drum or plate aforesaid, an open top pendant loop tongue at the opposite end to frictionally engage another groove in the drum, and a flat intermediate connecting portion for abutment of the end type pieces of a number of successive type rows.

4. As a new article of manufacture, a retaining device for holding type to the grooved surfaces of the drums or plates of printing machines, said device being formed from spring strip metal with a rounded pendant loop tongue adapted to be inserted downward into the grooves and to frictionally engage the sides of the latter. and with lateral projections to limit the penetration of the'tongue into the grooves; the loop aforesaid being open at the top to facilitate removal of the device by compression of its lateral projections.

5. As a new article of manufacture, a retaining device for securing rule type to the grooved surface of the type drum or plate of a printing machine, said device being formed from spring strip metal with a rounded pendant loop tongue adapted to be inserted downward into the groove and to frictionally engage the sides of the latter, with lateral projections to limit penetration of the tongue into the grooves, and with a notch for capacity to lappingly engage the base portion of the rule type, the loop aforesaid being open at the top to facilitate removal of the device by compression of its lateral projections.

ERWIN H. ALDINGER. WALTER E. FRIEDRICHS. 

